david31
Leading Member
My 17-55 IS is sharper in portrait mode than landscape mode. Has any one else seen this effect?
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17-55 sharper in portrait than landscape
- Thread starter david31
- Start date
jkuo
Well-known member
Any samples you can show? Is this with IS on in both cases?
david31
Leading Member
david31
Leading Member
IS in turned on both images.
taken on a tripod
taken on a tripod
I only find one image.
BTW, did you take just one shot for each position? For an issue like this I suggest taking at least three for each position and then pick the best of the three for each.
-Gene L.
...if you are using a tripod and then post some new pictures.
vincent0923
Active member
Laugh out out out loud! Why is Canon making lenses like this these days? The 70-300 IU is sharper in lanscape
andrewD2
Veteran Member
The lamp is sharper in one, the writing sharper in the other.
That bright light being close by makes the writing a bad focus target.
Andrew
That bright light being close by makes the writing a bad focus target.
Andrew
anthony kohn
Leading Member
My guess is that it has absolutely nothing to do with the lens - but all to do with the AF of the camera. At this point I don't recall which way, but most of the AF sensors in the camera are sensitive to either vertical or horizontal more than the other way. IIRC only the centre point has bot type sensors.
Now, the test shot you have shows the focus point of the lens is at two different points. The lamp in 3005 is in focus, whereas the card is far closer to the focal distance in 3006.
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http://planeguy.mine.nu/pictures
Now, the test shot you have shows the focus point of the lens is at two different points. The lamp in 3005 is in focus, whereas the card is far closer to the focal distance in 3006.
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http://planeguy.mine.nu/pictures
david31
Leading Member
New test shots posted with and with out IS.
1st shot from my Fuji s602 for reference.
Looks like you muct have IS OFF when using a tripos if you don't want fussy pics.
1st shot from my Fuji s602 for reference.
Looks like you muct have IS OFF when using a tripos if you don't want fussy pics.
mfurman
Veteran Member
I did quite a lot of tests and I see that the lens is sharp - comparable with primes.
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Michael
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Michael
david31
Leading Member
did you find the IS makes the picture blured whne the camera is ona tripod? se my samples http://www.pbase.com/clairedouglas
mfurman
Veteran Member
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Michael
Michael
What is the tripod and head you're using?
david31
Leading Member
It's a cheap one from jessops.
I think the IS is part of the problem. Turning off seems to improve the sharpness.
I think the IS is part of the problem. Turning off seems to improve the sharpness.
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